iptables中用来添加规则的选项是（）A、-A B、-F C、-E D、-N_爱下问搜题

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问题单项选择题

iptables中用来添加规则的选项是（）

A、-A

B、-F

C、-E

D、-N

答案

参考答案：A

完形填空

"Everything happens for the best." my mother said whenever I felt disappointed. " 36 , and one day something good will happen. Then you'll realize it wouldn't have happened 37 the disappointment you had experienced 38 ." Mother was right, 39 I discovered after graduating from college, I had decided to try for a job 40 radio, then 41 my way up to a sports announcer. I hitchhiked (搭免费车) to Chicago and tried every station, but got 42 . In one studio, a kind lady told me big stations couldn't risk hiring inexperienced persons. "Try your luck in the 43 " she said.
I hitchhiked home to Dixon, Illinois, where there was no radio-announcing jobs. My father said a store wanted a local 44 to manage its sports department. Since Dixon was 45 I had played high school football, I 46 . The job sounded just 47 for me. But l wasn't hired.
My disappointment 48 have shown. "Everything harem for the best." Mother 49 . Then I tried WOC Radio in Davenport, Iowa. The program director, Peter MacArthur, told me they had already hired an announcer. As I left his office, my disappointment boiled 50 . I asked aloud. "How can a fellow become a sport announcer if he can't get a job in a radio station?"
I was waiting for the 51 when I heard MacArthur calling, "What was that you said about sports? You know something about football?" Then he 52 me before a 53 and asked me to broadcast a(n) 54 game.
On my way home, as I have many times 55 , I thought of my mother's words.

D．Concentrate on

A．in spite of

B．regardless of

C．shop assistant

A．recommended

判断题

目前鼻窦的影像学检查首选MRI。（）